[Mailman-Users] no dupes across lists?

[Brad Knowles]

Check your Message-ID: headers. IIRC, Mailman doesn't change those  
when taking an incoming message and sending that back out.

In addition I happen to know from personal experience that Eudora has  
some very powerful duplicate suppression capabilities -- they are one  
of the few tools that helps keep me sane.

-- 
Brad Knowles <brad at shub-Internet.org>

Sent from my iPhone

On Dec 17, 2007, at 2:52 AM, Allan Hansen <hansen at rc.org> wrote:

> At 2:34 +0900 12/17/07, Stephen J. Turnbull wrote:
>> Allan Hansen writes:
>>
>>> That's interesting.
>>>
>>> I run Mailman 2.1.5 (Mac OS X 10.4) and have the 'problem' that
>>> when someone posts to two lists at a time, I get only one message. I
>>> actually do want to get both for archival purposes. If this is not a
>>> function of Mailman 2.1.5, I wonder where the other message is
>>> cut. :-)
>>
>> What do you mean by "get"?  I "get" both messages in my system
>> mailbox, but because I have duplicate suppression on in my MUA, I  
>> only
>> "see" one.  The MUA automatically skips any message with a Message-ID
>> that it has already seen.
>
> More detail:
>
> One message from a subscriber's MUA goes to two lists in Mailman  
> because that person is addressing it using
>
> To: list1 at abc.com, list2 at abc.com
>
> The subscriber (who is not I) is subscribed to both lis1 and list2  
> (I verified this).
> I'm also subscribed to both list1 and list2 (also verified).
>
> Mailman is the actual recipient of this message. However, being a  
> listserver, Mailman becomes the originator (literally) of two new  
> messages, one for the subscribers of list1 and another for the  
> subscribers of list2. It has to be two messages, because one message  
> has additional headers and a footer added for list1 and the other  
> has headers and a footer added for list2. In fact, Mailman even adds  
> the Sender: header with the list as the sender.
>
> I'm subscribed to both list1 and list2, so I'll expect to see two  
> different messages being picked up by my MUA. One message with  
> Sender: list1 at abc.com and another with Sender: list2 at abc.com.
>
> This, in fact, is how it worked in a previous list server (ListStar)  
> that I used before Mailman.
>
> In Mailman I'm seeing only the message corresponding to list2.
>
> My MTA is Postfix and my MUA is Eudora (both running under Mac OS X  
> 10.4.11).
>
> I cannot imagine my MUA comparing the two messages and throwing one  
> out, as the message bodies are, in fact, different. Ditto for the  
> MDA and MTA.
>
> Allan
>
>>
>> I would assume you've got a similar feature, perhaps not in your MUA
>> but in the MDA or MTA.
>>
>>>
>>> (No need for action from anyone - I was just mumbling aloud).
>>>
>>> Allan
>>>
>>> At 16:49 -0800 12/14/07, Mark Sapiro wrote:
>>>> Gruver, Sandi wrote:
>>>>
>>>>> Does the 'no dupes' option mean that members will not receive a  
>>>>> messages
>>>>> sent to more than one list to which they are subscribed?
>>>>
>>>>
>>>> No. It only means that a member will not receive the post from  
>>>> the list
>>>> if (s)he in specifically addressed in To: or Cc: of the post.
>>>>
>>>> If you have lists with duplicate members which are frequently cross
>>>> posted, the new sibling lists 'exclude' feature in Mailman 2.1.10  
>>>> can
>>>> be used to avoid these duplicate messages.
>>>>
>>>> -- 
>>>> Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
>>>> San Francisco Bay Area, California    better use your sense - B.  
>>>> Dylan
>>>
>>> -- 
>>> Allan Hansen
>>> P.O Box 2423
>>> Cypress, CA 90630
>>> U.S.A.
>>> hansen at rc.org
>>> +1-714-875-8870
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>
> -- 
> Allan Hansen
> P.O Box 2423
> Cypress, CA 90630
> U.S.A.
> hansen at rc.org
> +1-714-875-8870
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